--- a/channels/chan_sip.c	2009-09-06 18:40:27.082670327 -0400
+++ b/channels/chan_sip.c	2009-09-06 19:54:10.977797951 -0400
@@ -4380,6 +4380,8 @@ static int parse_uri(char *uri, const ch
 		char *scheme2 = ast_strdupa(scheme);
 		char *cur = strsep(&scheme2, ",");
 		for (; !ast_strlen_zero(cur); cur = strsep(&scheme2, ",")) {
+			if (strchr(cur, ':') == NULL)
+				cur = strncat(cur, ":\0", 1);
 			l = strlen(cur);
 			if (!strncasecmp(uri, cur, l)) {
 				uri += l;